Hi @Anonymous,
Thanks for the feedback.
Please take a try to press F5 (if not working, try Ctrl + F5) to refresh the Flow editing Page.
In addition, check to see if open Internet Explorer 11 in Private mode would help.
It seems there are some display issues when Editing Microsoft Flow under Internet Explorer 11.
I will collect this as a feedback.
Appreciate your patience.
Regards,
Michael